Mary Magnolla has variable costs equal to y2/F, where y is the number of bouquets she sells per month and where FIs the number of square feet of space In her shop. Marginal cost of a bouquet is 2y/F. If Mary has signed a lease for a shop with 600 square feet, If she is not able to get out of the lease or to expand her store in the short run, and If the price of a bouquet is $8 per unit, how many bouquets per month should she sell In the short run? 800 400 2640 O 1200 2400